Version 4
SHEET 1 880 680
WIRE 160 0 -112 0
WIRE 288 0 160 0
WIRE 416 0 288 0
WIRE -112 16 -112 0
WIRE 160 48 160 0
WIRE 288 48 288 0
WIRE 416 48 416 0
WIRE 624 80 544 80
WIRE 544 96 544 80
WIRE -112 128 -112 96
WIRE -112 176 -112 160
WIRE 160 176 160 128
WIRE 288 176 288 128
WIRE 416 176 416 128
WIRE 112 192 96 192
WIRE 240 192 224 192
WIRE 368 192 352 192
WIRE 528 240 496 240
WIRE 656 240 608 240
WIRE 112 256 112 240
WIRE 240 256 240 240
WIRE 368 256 368 240
WIRE -112 272 -112 256
WIRE 96 272 96 192
WIRE 96 272 -112 272
WIRE 224 272 224 192
WIRE 224 272 96 272
WIRE 352 272 352 192
WIRE 352 272 224 272
WIRE 544 288 544 176
WIRE 160 304 160 256
WIRE 288 304 288 256
WIRE 288 304 160 304
WIRE 416 304 416 256
WIRE 416 304 288 304
WIRE 496 304 496 240
WIRE 496 304 416 304
WIRE 512 304 496 304
WIRE 656 320 656 240
WIRE 656 320 576 320
WIRE 688 320 656 320
WIRE 512 336 496 336
WIRE 688 336 688 320
WIRE 544 368 544 352
WIRE 624 368 624 80
WIRE 624 368 544 368
FLAG 688 320 Uout
FLAG 112 256 0
FLAG 240 256 0
FLAG 368 256 0
FLAG -112 128 0
FLAG 496 336 0
FLAG -112 160 0
SYMBOL voltage -112 0 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(1 9 30)
SYMBOL sw 416 160 R0
SYMATTR InstName S1
SYMATTR Value MYSW3
SYMBOL sw 288 160 R0
SYMATTR InstName S2
SYMATTR Value MYSW2
SYMBOL sw 160 160 R0
SYMATTR InstName S3
SYMATTR Value MYSW1
SYMBOL voltage -112 272 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(-3 3 0 1e-12 1e-12 0.5m 1m)
SYMBOL res 144 32 R0
SYMATTR InstName R1
SYMATTR Value 64
SYMBOL res 272 32 R0
SYMATTR InstName R2
SYMATTR Value 128
SYMBOL res 400 32 R0
SYMATTR InstName R3
SYMATTR Value 256
SYMBOL Opamps\\LT1001 544 256 R0
SYMATTR InstName U1
SYMBOL voltage 544 192 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value -9
SYMBOL res 512 256 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 1k
TEXT -114 304 Left 2 !.tran 1m
TEXT -112 328 Left 2 !.model MYSW1 SW(Ron=-3 Roff=-1)
TEXT -112 352 Left 2 !.model MYSW2 SW(Ron=-1 Roff=1)
TEXT -112 376 Left 2 !.model MYSW3 SW(Ron=1 Roff=3)
